Steps To Recover XML Responses Returned By A Java Servlet

 

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Return XML Response In Servlet

In this sample application, we will show you how to use an XML response in a servlet application. This example was tested in the app and therefore posted in the same post.

Project structure

Servlet class (ProductService.java)

Com.dineshkrish.service package;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;goods com.dineshkrish.pojo.import;import com.dineshkrish.util.XMLConverter;/ ** @Author * Dinesh Krishnan * * /Public class ProductService extends HttpServletpublic void doGet (HttpServletRequest, HttpServletResponse)throws ServletException, IOException// Define the PrintWriter objectPrintWriter out = response.getWriter ();// Determine the type of responseresponse.setContentType (“app / xml”);// Create a product objectA manufactured product means a new product ();// define the attributesproduct.setProductCode (10001);product.setProductName (“pain”);product.setProductDescription (“Fresh bread”);// Convert objects to XML using the JAX-B API.out.println (XMLConverter.convert (product));out.close ();

POJO Class (Product.java)

Com.dineshkrish.pojo package;import javax.xml.bind.annotation.XmlRootElement;/ ** 3.* @ Posted by Dinesh Krishnan * * /@XmlRootElementpublic product classprivate int product code;private channel product name;private channel productDescription;public int getProductCode ()Product return code;public void setProductCode (int productCode)this.productCode denotes the product code;public string getProductName ()The name of the returned item;override public setProductName (String productName)this.productName matches productName;public string getProductDescription ()Return the product description;public gap setProductDescription (string productDescription)this.productDescription = productDescription;

Object to XML converter (XMLConverter.java)

Com.dineshkrish.util package;import java.io.StringWriter;import javax.xml.bind.JAXBContext;import javax.xml.bind.JAXBException;import javax.xml.bind.Marshaller;goods com.dineshkrish.pojo.import;/ ** * * Dinesh @author Krishnan * * /public class XMLConverterpublic conversion of static string (produced product)StringWriter source = new StringWriter ();if (product! equals zero)TryJAXBContext context = JAXBContext.newInstance (Product.class);Marshaller Marshaller = context.createMarshaller ();Marshaller.marshal (work, author);country (JAXBException e)e.printStackTrace ();return write.toString ();

Application start page (index.html)

The Service Is Definitely Running …

Configuration file (web.xml)

WebService index.html Product Service com.dineshkrish.service.ProductService product service / getProduct

exit

Links

Hi guys, I’m the president of idineshkrishnan.com. I love open dealer technology. If you find any of our guides helpful, consider donating to these charities.

One of the tricks is to constantly complicate the code a little. Servlets should not be imported via java.sql. Put the working code in a separate class, test it, or let the servlet do its thing.

You create XML the craziestm way, thus concatenating strings. Why not use a library like JDOM or at least StringBuilder?

Here are some ideas anyone can come up with for layering. To sell, start with a model object – after all, an object-oriented Java language:

  package badservlet.model;public sale   saleId of the private channel;    private channel homeId;    private string agentId;    Private channel client ID;    Public sale (saleId string, homeId string, agentId string, customerId string)     (homeId.trim (). length () == 0)            throw newbie IllegalArgumentException ("house ID cannot be empty, except zero");       if ((agentId == null)    public string getSaleId ()            Reunion trade identifier;        public string getHomeId ()            Earn HomeId;        public string getAgentId ()            Enter the agent ID;        public string getCustomerId ()            Return client ID;        @ Crush    public string toString ()            Visit "Sales" again +               "venteId = '" + venteId +'  '' +               ", homeId = '" + homeId +'  '' +               AgentId = '"rrn., + AgentId +'  '' +               ", customerId = '" + customerId +'  '' +               '';     

  package badservlet.persistence;import badservlet.model.Sale;import java.sql.SQLException;import java.util.List;SaleDao public interface    List  find () throws SQLException; 

  package badservlet.persistence;import badservlet.model.Sale;import javax.sql.DataSource;import java.sql.Connection;import java.sql.ResultSet;import java.sql.SQLException;import java.sql statement;import java.util.ArrayList;import java.util.List;public class SaleDaoImpl implements Saledao   private static end row SELECT_ALL_SQL = "SELECT sale_id, home_id, agent_id, customer_id FROM sale";    individual connection;    Most people SaleDaoImpl (login link)            this.connection = connection;        the normally public SaleDaoImpl (DataSource dataSource) throws SQLException            this (dataSource.getConnection ());        open to public list  find () throws SQLException            List  allSales New = ArrayList  ();        Statement = null;        ResultSet rs is null;        Try                    st implies this.connection.createStatement ();            Player st = .executeQuery (SELECT_ALL_SQL);            during (rs.next ())                            String saleId = rs.getString ("sale_id");                String homeId Rs = .getString ("home_id");                The agentId string includes rs.getString ("agent_id");                String customerId = rs.getString ("customer_id");                Sale Sale а = new sale (SaleId, HomeId, AgentId, KundenId);                allSales.add (sales);                            catch (SQLExceptionE)                   E.printStackTrace ();                in the end                    experiment with (rs if! = null) rs.close (); catch (SQLException e) e.printStackTrace ();            try (st if! is zero) st.close (); catch (SQLException e) e.printStackTrace ();               Return of all sales;    

  package badservlet.xml;import badservlet.model.Sale;import org.jdom.Document;import org.jdom.Element;import org.jdom.transform.JDOMResult;import javax.xml.bind.JAXBException;import javax.xml.transform.Result;import java.util.List;public class SaleUnmarshaller    public void unmarshal (object target, xml result) throws JAXBException            List  allSales is equal to (List ) object;        Document document corresponds to a new document (new element ("Sales"));        in (Sales Sales: allSales)                    Subsidiary = new product ("sale");            child.setAttribute ("identifier", sale.getSaleId ());            child.addContent (new element ("home", sale.getHomeId ()));            child.addContent (new element ("agent", sale.getAgentId ()));            child.addContent (new element ("Customer", Sale.getCustomerId ()));            document.addContent (child);                JDOMResult Result = Newly acquired JDOMResult ();        result.setDocument (document);XML implies the result;     

This may sound more complicated – more practice than just one – but you’ve already done two things: you’ve broken these problems down into smaller pieces and you can test them individually.

 

 

Speed up your PC today with this easy-to-use download.

 

 

 

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